/*ShoppingCartController2
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import DAO.DanhMucDAO;
import DAO.LoaiSanPhamDAO;
import DAO.SanPhamDAO;
import POJO.DanhMucPOJO;
import POJO.LoaiSanPhamPOJO;
import POJO.SanPhamPOJO;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author NGUYEN CONG BINH
 */
@WebServlet(name = "ShoppingCartController2", urlPatterns = {"/ShoppingCartController2"})
public class ShoppingCartController2 extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
        response.setContentType("text/html;charset=UTF-8");
        String action = request.getParameter("Action");
        //bảng danh muc
        ArrayList<DanhMucPOJO> dm = DanhMucDAO.layDanhSachDanhMuc();
        request.setAttribute("danhmucAttribute", dm);
        //bảng loại sản phẩm
        ArrayList<LoaiSanPhamPOJO> loaisanpham = LoaiSanPhamDAO.layDanhSachLoaiSanPham();
        request.setAttribute("loaisanphamAttribute", loaisanpham);
        //bảng sản phẩm
        ArrayList<SanPhamPOJO> sanpham = SanPhamDAO.layDanhSachSanPham();
        request.setAttribute("sanphamAttribute", sanpham);
        HttpSession session = request.getSession();
        ArrayList<SanPhamPOJO> giohang = null;
        if (session.getAttribute("GioHang") == null) {
            giohang = new ArrayList<SanPhamPOJO>();
            session.setAttribute("GioHang", giohang);
        } else {
            giohang = (ArrayList<SanPhamPOJO>) session.getAttribute("GioHang");
        }

        if (action.equals("Buy")) {
            int maSanPham = Integer.parseInt(request.getParameter("MaSanPham"));
            boolean flag = false;
            for (int i = 0; i < giohang.size(); i++) {
                SanPhamPOJO sp = giohang.get(i);
                if (sp.getMaSanPham() == maSanPham) {
                    sp.setSoLuong(sp.getSoLuong() + 1);
                    flag = true;
                    break;
                }
            }
            if (flag == false) {
                SanPhamPOJO g = SanPhamDAO.layChiTietSanPham(maSanPham);
                g.setSoLuong(1);
                giohang.add(g);
            }
request.getRequestDispatcher("ShoppingCartController2?Action=View").forward(request, response);
        }
        
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
